Seiko Cal. 7143 - 503

The Seiko 7143-503 represents an important milestone in Seiko's 1974 lineup. Powered by the 7143 caliber with 29j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-b039b4bfa623]

Also known as: Bullhead, Bellmatic

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

36mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

40m

Dial Color

Navy

Jewels

29j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1974

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